Flow amount detector



FIG. 1 is a top, front and right-side perspective view of a flow amount detector showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a flow amount detector, as shown and described. 